[1] His major roles are Atsushi Kinugawa in Cute High Earth Defense Club Love!, Sakutaro Kirara in Jewelpet: Magical Change, Kazunori Uesugi in Tantei Team KZ Jiken Note, Yoshiharu Hisomu in Kiznaiver and Ryūichi Kashima in School Babysitters.

[4] In 2009, he participated in the 3rd 81 Audition and won a special award, after which he entered 81 Produce's training school.

In 2015, he launched the entertainment group "Ooimachi Cream Soda" along with Reona Irie and Yuu Taniguchi.

As part of Ooimachi Cream Soda, Nishiyama also acts in various stage plays.

In 2020, Nishiyama made his debut as singer from Lantis with mini album CITY.